diff --git a/srcpkgs/linssid/patches/time64.patch b/srcpkgs/linssid/patches/time64.patch
new file mode 100644
index 00000000000..2fc66069d8f
--- /dev/null
+++ b/srcpkgs/linssid/patches/time64.patch
@@ -0,0 +1,43 @@
+--- linssid-app/MainForm.cpp	2018-06-23 18:36:57.000000000 +0200
++++ linssid-app/MainForm.cpp	2021-02-13 00:46:29.112580143 +0100
+@@ -81,8 +81,8 @@
+     int cenChan; // center channel in 40/80/160 MHz bandwidths
+     string vendor;
+     bool firstPlot;
+-    long firstSeen;
+-    long lastSeen;
++    time_t firstSeen;
++    time_t lastSeen;
+     string netType;
+     QColor color;
+     QwtPlotCurve* pBandCurve;
+@@ -162,11 +162,11 @@
+ int MainForm::maxTableIndex; // holds the highest index pointer into cellData
+ int MainForm::numVendors;
+ int MainForm::maxVendorRecL;
+-long MainForm::runStartTime;
+-long MainForm::now; // absolute time of the block
++time_t MainForm::runStartTime;
++time_t MainForm::now; // absolute time of the block
+ pageBlockType pageBlock; // which section of page is data coming from
+ int MainForm::logDataState;
+-long MainForm::blockSampleTime; // time of the block relative to runStartTime
++time_t MainForm::blockSampleTime; // time of the block relative to runStartTime
+ bool MainForm::firstScan; // do we need to get sudo privileges?
+ 
+ string MainForm::chan24Freq[15] {
+--- linssid-app/MainForm.h	2018-06-23 18:34:52.000000000 +0200
++++ linssid-app/MainForm.h	2021-02-13 00:48:01.969756452 +0100
+@@ -86,9 +86,9 @@
+     static int maxTableIndex;
+     static int numVendors;
+     static int maxVendorRecL;
+-    static long runStartTime;
+-    static long blockSampleTime;
+-    static long now;
++    static time_t runStartTime;
++    static time_t blockSampleTime;
++    static time_t now;
+     static int logDataState;
+     static bool firstScan;
+     static string wlPrivacies[3];